The Forbidden Swap Game

Lyra boards a luxury cruise liner with her husband Marcus and pretends she has lost her memory, as a test of him. Marcus hands her over to his brother Ethan and keeps his distance. Ethan takes her in as his wife and she lives with him under that arrangement. Lyra then learns that Marcus has kept a mistress for seven years, has run a second life alongside a marriage in which he never loved her, and has a scheme of his own under way. Ethan, who is only standing in as her husband, has fallen in love with her. She keeps up the amnesia while she decides whether to stay with him or go back to Marcus. Neither brother has been told that her memory is intact.